Tool setter for lathes



Feb. 20, 1951 D. MORRIS TOOL SETTER FOR LATI-IES Filed June 29, 1949[77//// //A `i/// ////////////////Y INVENTOR. z/dLlllarrz's PatentedFeb. 20, 1951 UNITED STATES PATENT OFFICE TOOL SETTER FOR LATHES DavidMorris, Sidney, 4Ohio Application June 29, 1949, Serial No. 102,078

2 claims. (Cl. 3x5-185) i This invention relates to a gauge for settingtools mismas.

An object of this invention is to provide a gauge whereby the height ofone or more tools of a lathe can be very iinely gauged, and the latheset for cutting to a predetermined diameter.

Another object of this invention is to provide a gauge which willeliminate mistakes which are frequently made in setting of the tools andwill also eliminate wastage in improperly cut work,

A further object of this invention is to provide a gauge of this kindwhich is simple in construction and can be easily and quickly set up.

In certain lathes, at least one tool carriage is movable horizontally,and one or more other carriages 'are movable in either a horizontalplane or in a plane inclined to the horizontal, with the latter carriageor carriages movable at right angles to the movement of the rst carriageor carriages. The gauge herein disclosed is adaptable to all of thecarriages so that each tool can be accurately set for movement in aplane parallel to the movement of its respective carriage.

With the above and other objects in view, my invention consists in thearrangement, combination and details of construction disclosed in thedrawing and specification, and then more particularly pointed out in theappended claims.

In the drawing,

Figure l is a detail side elevation, partly broken away and in section,of a gauge for use in setting tools in lathes,

Figure 2 is a plan view partly broken away of the device,

Figure 3 is a sectional view taken on the line 3-3 of Figure 1,

Figure 4 is a sectional view taken on the line 4-4 of Figure 1,

Figure 5 is a sectional view taken on the line 5--5 of Figure 2.

Referring to the drawing, the numeral ID designates generally anelongated bar or shaft which is provided at the opposite ends thereofwith tapered recesses I3 within which the center points of a lathe areadapted to engage. The bar I0 is provided with a longitudinallyextending open- 'ing II which terminates at each end thereof inwardlyfrom the ends of the bar I0 and `a right angularly disposed elongatedopening I2 is formed in the bar I0 and communicates with the opening ingII and also includes a right angularly disposed key or shank IB slidablyengaging in the opening I2. The key or shank It is secured to the bodyI5 by means of fastening means Il. An elongated gauge bar I8 is looselydisposed in an opening I9 formed in the body I5 and is adapted toproject right angularly with respect to the length of the bar IU.

The gauge bar I8 is disposed with the upper side 20 thereof coplanarwith the longitudinal axis of the bar lil and the opposite ends of thegauge bar I8 are pointed or tapered as indicated at ZI.

The gauge bar I8 is provided with suitable .gradu-v ations 22 on theupper side thereof so that this `gauge bar can be accurately positionedwith respect to the body or carriage I4. The gauge bar I8 is adjustablysecured in the opening guide I9 by means of a set screw 23 having a head24, and the set screw 23 is threaded through the shank or key member I6.

The bar I0 is provided in the upper side thereof with an arcuate recess25 within which a spirit level 26 is adapted to be secured, and thelevel 26 includes gauge marks 21 disposed lengthwise of the bar IIJ sothat when the bubble 28 is centered between the zero gauge marks 21, thegauge bar I8 will be horizontally disposed. The bar Ill also has formedtherein a longitudinally extending recess 29 within which a graduatedstrip 3l] is adapted to be positioned so that the gauge bar I8 may beaccurately adjusted lengthwise of the bar I0 in addition to beingaccurately adjusted transversely or at right angles to the bar lll.

In the use and operation of this device, the bar I!! is secured betweenthe center points of a lathe with the center points engaging in thesockets or center recesses I3. The gauge bar I8 is adjusted to ahorizontal position, the latter being determined by the zero mark onspirit level 26. The gauge bar I8 may be adjusted lengthwise of the barI0 to a selected position and may be transversely adjusted by looseningthe set screw 23. The tool at the front of the lathe may be adjustedwith respect to the gauge bar I3 and II. The two openings ll and I2 forma T-shaped opening or guide for an adjustable slide member generallydesignated as I4.

The slide member I4 comprises a flat body I5 which is slidably disposedin the horizontal openwhen this front tool has been accurately adjusted,the rear or other tool or tools may be accurately adjusted by turningthe gauge bar to the angle of rear carriage with respect to thehorizontal. The angle of the rear carriage being known for each lathe,the bar IB is angularly adjusted with the spirit level calibrations as aguide so that the gauge bar I8 will be parallel with the rear tool andrear carriage. IIhe spacing between the several carriages, both frontand rear is determined by the scale 30.

With a tool setting gauge as hereinbefore described, two or more opposedtools may be accesses in the ends thereof whereby saidibanmay' besupported between a pair of center points, said bar having a T-shapedopening extending'lengthwise thereof, a T-shaped slid'eengaging in said3slot and formed with an opening transversely `to the length of said baralongitudinally' curved' calibrated spirit level disposed transversely ofandcountersunkin' saidbar, an elongated gauge' member disposed in-saidopening of" said 'slide andprojecting: from opposite'sides of saidbar-fthe" upper side of said'gauge member being coplanar' with thelongitudinal axis of said bar, calibrations'on "theupper sideofsaidfgaugemember, and" means'securing saidy gauge member in end wiseadfjusted position in said slide.

fZA lathe tool setting gauge comprising an elongated round bar formedwith lcenter point? recesses in the` ends thereof whereby said bar Vmaybe supported between a pair of center points,

said bar having a T-shaped opening extending lengthwise thereof, aT-shaped slide engaging in said slot and formed with an openingtransversely to the length of said bar, a calibrated spirit levelcarried by said bar, an elongated gauge member disposed in saidY openingof said slide and projecting from opposite sides of said bar,v theupperside of said gauge member being coplana-r with the' longitudinali axis iof said bar, means securing said gauge member in endwise adjustedposition in said slide, and a calibrated scale countersunk in said barlengthwise thereof andalongitlie upper edge of said slot whereby thelengthwise position of said slide may be indicated.

DAVID L. MORRIS.

REFERENCES CITED The following references are of record in the fille" ofthis* paitentt UNITED STATES PATENTS Number Name Date '2;19""7;2'7'8"Y YSverdahl Apr. 16; 1940 Y FOREIGN PATENTS NumberY Country Datel 309,435'Germany Nov. 18,v 1918 328,295k Germany Oct. 27; 1920r 552;?26'GreatBritain Y Apr; l, 1943

